Belt driving apparatus and image forming apparatus

a driving apparatus and belt technology, applied in the direction of electrographic process apparatus, instruments, optics, etc., can solve the problems of affecting the stability the lateral deviation of the belt member, and the liable instability of the frictional force of the contact belt, so as to improve the responsiveness to lateral deviation (movement) of the belt member and enhance the contact stability
US8837989B2Inactive Publication Date: 2014-09-16CANON KK
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
CANON KK
Publication Date
2014-09-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

A belt driving apparatus includes a movable belt member, a stretching member configured to stretch the belt member, and a steering unit configured to stretch the belt member and to be inclined to steer the belt member in a widthwise direction substantially perpendicular to a direction of moving of the belt member. The steering unit includes a rotatable member contacting an inner surface of the belt member and configured to be rotatable with movement of the belt member around a rotational axis of the rotatable member, with the rotational axis extending in the widthwise direction, and non-rotatable members contacting an inner surface of the belt member, provided at each opposite axial end of the rotatable member and configured not to be rotatable with movement of the belt member. In addition, a supporting member supports the rotatable member and the non-rotatable members, and is inclined by frictional force from sliding between the belt member and each of the non-rotatable members, around an axis perpendicular to the rotational axis, and urging members urge the belt member in contact with an outer surface of the non-rotatable members, with each of the urging members disposed against one of the non-rotatable members.
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Description

FIELD OF THE INVENTION AND RELATED ART

[0001] The present invention relates to a belt driving apparatus for driving a belt member relating to image formation. Specifically, the present invention relates to a belt unit for driving an intermediary transfer belt, a transfer belt, a photosensitive belt, etc., and also relates to an image forming apparatus such as a copying machine, a printer, a printing machine, etc., which includes the belt unit.

[0002] In recent years, with speed-up of the image forming apparatus, a constitution in which a plurality of image forming portions are arranged corresponding to a belt member and image forming processes for respective colors are concurrently performed goes mainstream. For example, as a representative belt member in a full-color image forming apparatus of an electrophotographic type, the intermediary transfer belt is used. Onto a belt steering of the intermediary transfer belt, respective color toner images are successively transferred superposedl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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